Basis of sample size calculation: The national average time for cecal intubation is 15 minutes. A reduction in the colonoscopy duration by 3 minutes would be clinically meaningful and reduce cost. We do 15-20 outpatient colonoscopies in two rooms with one nurse per room daily at the West Haven VA and a reduction of 3 minutes per colonoscopy will save 45-60 minutes per day and this does not include the potential reduction in recovery time from using less sedation.